Then you are probably aware that it has not mattered because of Intels shady tactics. [0][1][2][3] etc.

[0] https://www.wired.com/2009/12/ftc-sues-intel-for-anti-compet...

[1] http://www.silicon.co.uk/workspace/dell-pays-65million-to-se...

[2] http://techreport.com/news/8547/does-intel-compiler-cripple-...

[3] http://www.agner.org/optimize/blog/read.php?i=49#49